单选题夜间可收到距发射台()海里的劳兰C天波信号。A2400B2300C2200D1200
单选题
夜间可收到距发射台()海里的劳兰C天波信号。
A
2400
B
2300
C
2200
D
1200
参考解析
解析:
暂无解析
相关考题:
单选题直航高速前进中的船舶,当存在横倾时:()A在首波峰压力转矩的作用下,船首易向低舷一侧偏转B在阻力和推力转矩的作用下,船首易向低舷一侧偏转C在阻力和推力转矩的作用下,船首易向高舷一侧偏转D在首波峰压力转矩的作用下,船首易向高舷一侧偏转
单选题经CCS按照其规范进行检验合格后,签发的证书有()。 Ⅰ.船体入级证书; Ⅱ.轮机入级证书; Ⅲ.货物冷藏入级证书; Ⅳ.船舶适航证书; Ⅴ.船舶起重设备检验和试验证书。AⅠ~ⅢB除Ⅴ其他都是C除Ⅳ其他都是D除Ⅲ其他都是
单选题A warmer than normal compressor suction line might be caused by ().Ainsufficient lubricationBinsufficient refrigerantCexcess refrigerantDexcessive opening of the expansion valve
单选题关于膨胀阀说法错误的是:()A内平衡式弹性元件上方作用着温包内饱和压力B外平衡式弹性元件上方作用着温包内饱和压力C外平衡式弹性元件下方作用着蒸发器出口压力D原来用外平衡式膨胀阀的蒸发器改用内平衡式后,出口过热度减小
单选题A cargo hold has been determined to have a relative humidity of 80% and a dry bulb temperature of 80 ℃ and a dry bulb temperature of 85℃.When the hold is sealed and the dry bulb temperature decreases, the relative humidity in the space will ()AdecreaseBincreaseCdecrease to zeroDremain unchanged
单选题A two-stroke/cycle diesel engine requires less starting air than a four-stroke/cycle diesel engine, of equal displacement, because the two-stroke/cycle diesel engine()Ahas little or no internal frictionBhas a lower effective compression ratioCoperates with scavenge air under a positive pressureDoperates without energy absorbing intake and exhaust strokes
单选题一般船舶在靠泊操纵时,有关控制抵泊余速的操作哪一种说法明显不正确()?A能保证舵效的情况下,速度尽量慢B淌航至泊位后端是控制余速的关键时刻C船首抵泊位旗时的余速以不超过2节为宜D空载而横风较大时,余速应降低
单选题若支撑某主轴承右于其他相邻轴承,则对应的臂距差()。A0B0C=0D不一定